File and Directory Permissions Modification

Adversaries may modify file or directory permissions to evade defenses.

Deletes Audit logs

Deletes logs related to the Linux Audit framework.

Deletes system logs

Deletes log file which contains global system messages. Adversaries may delete system logs to minimize their footprint.

OS Credential Dumping

Adversaries may attempt to dump credentials to use it in password cracking.

Adds a user to the system

Creates/modifies Cron job

Cron allows running tasks on a schedule, and is commonly used for malware persistence.

Creates/modifies environment variables

Creating/modifying environment variables is a common persistence mechanism.

Deletes log files

Deletes log files on the system.

Enumerates running processes

Discovers information about currently running processes on the system

Modifies rc script

Adding/modifying system rc scripts is a common persistence mechanism.

Modifies Bash startup script

Executes dropped EXE

Creates a large amount of network flows

This may indicate a network scan to discover remotely running services.